Figure 1.
Comparison of musically-trained children (red) and untrained controls (black) showing no group difference in the first half of the continuation tapping period (Wilcoxon rank sum test: p > 0.1) but significantly reduced error in the trained group in the second half (p = 0.0205, zval = -2.32, ranksum = 706).
A smaller mean error reflects better ability to keep the beat. (Error bars indicate +/-1SE of the mean.)
Figure 2.
Histograms showing the distribution of tapping accuracy scores in the musically trained and untrained control groups.